Updates to support wordpress 3.9

git-svn-id: https://plugins.svn.wordpress.org/wp-backitup/trunk@908524 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add log placeholder

git-svn-id: https://plugins.svn.wordpress.org/wp-backitup/trunk@908525 b8457f37-d9ea-0310-8a92-e5e31aec5664